Re: [Condor-users] Scheduling in hetrogenous environment

[Rod Walker <rwalker@xxxxxx>]

David,
You`ll need to set Requirements, either in the job classad or the 
resource classad.
e.g.
Job :- Requirements = FreeCpus - CurrMatches > 0
Resource:-
CurrMatches = 0
FreeCpus = 14
would match 14 jobs and then wait untill the classad is updated. If at 
that time FreeCpus = 0, then the Requirements are false and the match is 
not made.

You could also set the resource
Requirements = Jobs_from_condorG < 5
but Jobs_from_condorG would have to be calculated by you.

How`ve you set the machine max to 5?

Cheers,
Rod.

David Wallom wrote:

> Hello,
>
> I have 3 machines that can be submitted to from a Condor-G jobmanager. 
> I have set within the machine classads that they can run a maximum of 
> 5 jobs each, When I submit the job I use the ‘Rank’ facility to set it 
> so that the fasted machine is always selected first. My problem is 
> that the jobs get allocated as follows:
>
> 1^st 5 jobs Machine 1 (very quick)
>
> 2^nd 5 jobs Machine 2 (slow)
>
> 3^rd 5 jobs Machine 3 (very very slow)
>
> 4^th 5 jobs Machine 1
>
> 5^th 5 jobs Machine 2
>
> 6^th 5 jobs Machine 3
>
> 7^th 5 jobs Machine 1
>
> 8^th 5 jobs Machine 2
>
> 9^th 5 jobs Machine 3
>
> And so on. My problem is that the destination of the jobs seems to be 
> completely independent of whether that resource has jobs already 
> queued. i.e when the 1^st , 2^nd & 3^rd set of 5 jobs have been 
> submitted to resources the negotiation should stop until there is a 
> spare resource, ie my very fast machine would get the bulk of the jobs 
> not an equal share as happens at the moment.
>
> IS there anyway that you can force the Negotiator to operate 
> inconjunction to the resources and not preallocate which machines jobs 
> will get sent to?
>
> Cheers
>
> David
>
> ++++++++++++++++++++++++++++++++++++++++++
>
> Dr. David Wallom
>
> Operations Director
>
> Centre for e-Research Bristol
>
> Rm 4.56
>
> H.H. Wills Physics Laboratory
>
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>
> Bristol
>
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>
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>
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--
Rod Walker +1 6042913051